Large-span space pipe truss splicing system

Abstract

The invention belongs to the technical field of constructional engineering, and provides a large-span space pipe truss splicing system which comprises a plurality of jig frame units, the jig frame units are designed in a modularized mode and jointly form a jig frame, and a movable base is arranged below the jig frame units. The jig frame unit comprises a bearing top plate, a main body frame, an upper top plate and a lower top plate, the bearing top plate is located above the upper top plate and used for placing a pipe truss, and an angle adjusting assembly is arranged at the top of the movable base and penetrates through the jig frame unit to be movably connected to the bottom of the bearing top plate; the bottom of the height control assembly is installed on the top of the lower top plate, and the top of the height control assembly is movably connected with the bearing top plate. Through the designed adjustable jig frame, the height and angle of the jig frame can be adjusted, the construction efficiency is improved, and the material loss is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, in particular to a large-span space tube truss assembly system. Background Art

[0002] The long-span tube truss is a spatial structural system with steel tubes as the main components and connected by nodes. Its core advantages are reflected in the following aspects:

[0003] High structural efficiency: The circular steel tube has a closed cross-section, and its torsional rigidity is significantly better than that of open cross-section steel (such as H-shaped steel), making it more stable when subjected to complex loads.

[0004] The spatial triangular truss system reduces the need for lateral support and the amount of steel used by optimizing the arrangement of rods. For example, the roof truss of Kansai International Airport in Japan was almost intact in the 1995 Hanshin Earthquake, verifying its earthquake resistance.

[0005] Flexible shape: Steel pipes can be processed into straight lines, curves or broken lines to meet the needs of complex architectural shapes. The Suzhou Industrial Park Pedestrian Street Skylight Corridor adopts a spatial tube truss structure to form a unique shape like a "flowing ribbon".

[0006] Convenient construction: The nodes are welded or cast steel nodes to reduce the workload of on-site assembly. Shenzhen Baoan Stadium uses high-altitude sliding technology to achieve large cantilever structure installation and shorten the construction period.

[0007] With the development of modern construction technology, large-span spatial structures have become the mainstream form of iconic buildings. Traditional tube truss construction mostly uses fixed tyres combined with high-altitude bulk method, but conventional tyres are fixed steel structures, and their height and angle cannot be adjusted. When facing projects with different curvature radii and spans, the tyres need to be repeatedly dismantled and modified, which not only reduces construction efficiency, but also increases material loss. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a large-span space tube truss assembly system to solve the problems of conventional tire frames in the prior art, such as poor angle and height adjustment and insufficient adaptability.

[0009] A large-span space tube truss assembly system, including a tire frame unit, the number of the tire frame units is multiple and modular design is adopted, the multiple tire frame units together form a tire frame, a movable base is provided below the tire frame unit, the tire frame unit includes a load-bearing top plate, a main frame, an upper top plate and a lower top plate, the load-bearing top plate is located above the upper top plate and is used to place the tube truss, the top of the mobile base is provided with an angle adjustment component, the angle adjustment component passes through the tire frame unit and is movably connected to the bottom of the load-bearing top plate;

[0010] It further includes a height control component, the bottom of which is installed on the top of the lower top plate, and the top is movably connected to the load-bearing top plate.

[0011] Preferably, the jig unit is made of Q460 high-strength steel. After adjacent jig units are assembled, there is a gap between the adjacent load-bearing top plates above, and the cross-sectional area of the load-bearing top plate is larger than the cross-sectional areas of the upper top plate and the lower top plate.

[0012] Preferably, the upper top plate and the lower top plate are fixedly connected to the top and bottom of the main frame. The main frame is composed of main columns, cross beams and reinforcing beams. The number of main columns on one main frame is four and they are distributed in a rectangle.

[0013] Preferably, the top and bottom of the main column are respectively fixedly connected to the upper top plate and the lower top plate. The inside of the main column is hollow, and cross ribs are provided inside the main column. The cross ribs are welded inside the main column. The cross beams are symmetrically welded to the opposite side walls of two adjacent main columns up and down. The reinforcing beams are distributed in a grid shape inside the jig unit and both ends are fixedly connected to the side walls of the main column.

[0014] Preferably, the angle adjustment component includes an adjustment cylinder, an upper cover body, a lower cover body, an adjustment sphere and an adjustment rod. The bottom of the adjustment cylinder is fixedly installed on the moving base and the number of adjustment cylinders is multiple and distributed in a rectangle. The piston rod of the adjustment cylinder passes through the upper top plate. The upper cover body is fixedly connected to the end of the piston rod of the adjustment cylinder. The lower cover body covers the top of the upper cover body.

[0015] Preferably, a hemispherical surface is formed inside the upper cover body and the lower cover body. The adjustment sphere is movably located inside the upper cover body and the lower cover body. Locking screws are arranged in an annular distribution between the outer walls of the upper cover body and the lower cover body. The adjustment rod is fixedly connected to the outer wall of the adjustment sphere and the other end passes through the upper cover body and is fixed on the load-bearing top plate.

[0016] Preferably, the height control component includes an electric push rod and a universal joint. The bottom of the electric push rod is fixedly connected to the lower top plate and is distributed in an annular shape. The telescopic rod on the electric push rod passes through the upper top plate. The universal joint is located above the upper top plate and is fixedly connected to the end of the telescopic rod inside the electric push rod. The other end of the universal joint is fixedly connected to the bottom of the load-bearing top plate.

[0017] Preferably, an installation frame is provided on the outer wall of the load-bearing top plate. The vertical cross-sectional profile of the installation frame is "concave". A main shaft is provided inside the installation frame, and multiple turns of prestressed cables are wound around the main shaft. One end of the prestressed cable extends above the load-bearing top plate. A motor connected to an external power supply is provided on one side of the installation frame, and the output shaft of the motor is connected to the main shaft. After the jig units form a jig, a welding robot is provided on the top of one of the load-bearing top plates, and the welding robot is equipped with a welding fixture.

[0018] Preferably, positioning insertion rods are provided at the bottom of the lower top plate near the four corners. A positioning ring is provided on the top of the moving base, and the positioning ring is welded to the top of the moving base. Threaded fastening bolts are provided on the positioning insertion rods. After the positioning insertion rods pass downward through the positioning ring and the moving base, the fastening bolts pass upward through the positioning insertion rods and are locked at the bottom of the moving base. Moving wheels are provided at the bottom of the moving base near the four corners.

[0019] Preferably, connection insertion plates and limit frames are respectively installed on two adjacent jig units. An assembly plate is fixedly connected between the upper and lower cross beams. The connection insertion plates and the limit frames are respectively welded to the assembly plate. A positioning pin is provided outside the limit frame. After two adjacent jig units are assembled, the connection insertion plates are inserted into the limit frames, and the positioning pins are inserted into the connection insertion plates and the limit frames from above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting the jig units, the jig units adopt a modular design and can be spliced with each other. A load-bearing top plate is provided above the jig units, and the pipe truss is placed on the load-bearing top plate for assembly. A moving base is provided below the jig units, and an angle adjustment component is installed on the moving base. A height control component is provided inside the jig units. Specifically, by using the method of adjusting the spheres and electric push rods, the height and angle of the load-bearing top plate on the jig units can be adjusted, so that the pipe trusses with different curvature radii and spans can be flexibly adjusted to meet the assembly requirements of pipe trusses with different spans and curvatures, and there is no need for repeated disassembly, which not only improves the construction efficiency of the pipe trusses, but also reduces material losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the overall large-span space pipe truss assembly system of the present invention;

[0023] Figure 2 It is a schematic structural diagram of a single jig unit and other components of the present invention;

[0024] Figure 3 Schematic diagram of the component structures such as the main framework of the present invention;

[0025] Figure 4 Schematic diagram of the component structures such as the angle adjustment component and the height control component of the present invention;

[0026] Figure 5 Internal structure cross-sectional view of the angle adjustment component of the components of the present invention;

[0027] Figure 6 Schematic diagram of the component structures such as the moving base and the moving wheels of the present invention;

[0028] Figure 7 Schematic diagram of the component structures such as the connection plug board and the limit frame of the present invention.

[0029] In the figure:

[0030] 1. Bracket unit; 1-1. Load-bearing top plate; 1-2. Main framework; 1-2-1. Main vertical column; 1-2-2. Cross beam; 1-2-3. Reinforcing beam; 1-3. Upper top plate; 1-4. Lower top plate; 2. Moving base; 3. Cross rib; 4. Adjusting cylinder; 5. Upper cover body; 6. Lower cover body; 7. Adjusting sphere; 8. Adjusting rod; 9. Locking screw; 10. Electric push rod; 11. Universal joint; 12. Installation frame; 13. Prestressed cable; 14. Motor; 15. Welding robot; 16. Positioning plug rod; 17. Positioning ring; 18. Fastening bolt; 19. Moving wheel; 20. Connection plug board; 21. Limit frame; 22. Assembly plate; 23. Positioning pin. Specific embodiments

[0031] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] As shown in Figure 1 to Figure 7 shown:

[0033] Embodiment 1: The present invention provides a large-span space pipe truss assembly system, including a bracket unit 1. The number of bracket units 1 is multiple and modularly designed. A plurality of bracket units 1 together form a bracket. A load-bearing top plate 1-1 is provided above the bracket. A moving base 2 is provided below the bracket unit 1. The bracket unit 1 includes a main framework 1-2, an upper top plate 1-3 and a lower top plate 1-4. An angle adjustment component is provided on the top of the moving base 2. The angle adjustment component passes through the bracket unit 1 and is movably connected to the bottom of the load-bearing top plate 1-1;

[0034] It further includes a height control component. The bottom of the height control component is installed on the top of the lower top plate 1-4, and the top is movably connected to the load-bearing top plate 1-1.

[0035] It should be noted that through the set-up of the jig unit 1, the jig unit 1 adopts a modular design and can be spliced with each other. A load-bearing top plate 1-1 is arranged above the jig unit 1, and the pipe truss is placed on the load-bearing top plate 1-1 for assembly. A moving base 2 is arranged below the jig unit 1, and an angle adjustment component is installed on the moving base 2. A height control component is arranged inside the jig unit 1. Specifically, by using the adjusting sphere 7 and the electric push rod 10, the height and angle of the load-bearing top plate 1-1 on the jig unit 1 can be adjusted, so that it can be flexibly adjusted according to the pipe trusses with different curvature radii and spans, adapting to the assembly requirements of pipe trusses with different spans and curvatures. Moreover, it is no longer necessary to disassemble repeatedly, which not only improves the construction efficiency of the pipe truss, but also reduces material loss.

[0036] In this embodiment, the jig unit 1 is made of Q460 high-strength steel. After adjacent jig units 1 are assembled, there is a gap between the adjacent load-bearing top plates 1-1 above, and the cross-sectional area of the load-bearing top plate 1-1 is larger than the cross-sectional areas of the upper top plate 1-3 and the lower top plate 1-4.

[0037] It should be noted that by designing the jig unit 1 to be made of Q460 high-strength steel, the strength of the overall jig unit 1 is improved, ensuring the stability of the jig unit 1 in supporting the pipe truss after the pipe truss is installed. A gap is designed between two adjacent load-bearing top plates 1-1, so that when the angle of the load-bearing top plate 1-1 is adjusted, it will not come into contact with the adjacent load-bearing top plate 1-1, enabling it to adapt to the installation requirements of pipe trusses with different curvatures.

[0038] In this embodiment, the upper top plate 1-3 and the lower top plate 1-4 are fixedly connected to the top and bottom of the main frame 1-2. The main frame 1-2 is composed of main columns 1-2-1, cross beams 1-2-2 and reinforcing beams 1-2-3. The number of main columns 1-2-1 on one main frame 1-2 is four and they are distributed in a rectangular shape.

[0039] It should be noted that the main frame 1-2 is composed of main columns 1-2-1, cross beams 1-2-2 and reinforcing beams 1-2-3. The main columns 1-2-1 are distributed near the four corners of the main frame 1-2, thus providing support force for the upper top plate 1-3 and ensuring the service strength of the overall jig unit 1. Cross beams 1-2-2 are arranged between two main columns 1-2-1, thus improving the strength of the main columns 1-2-1 and reducing the situation of deformation of the main columns 1-2-1. The reinforcing beams 1-2-3 are installed inside the jig unit 1, further improving the strength of the jig unit 1.

[0040] In this embodiment, the top and bottom of the main column 1-2-1 are fixedly connected to the upper top plate 1-3 and the lower top plate 1-4 respectively. The inside of the main column 1-2-1 is hollow, and a cross rib 3 is provided inside the main column 1-2-1. The cross rib 3 is welded inside the main column 1-2-1. The cross beams 1-2-2 are symmetrically welded up and down on the opposite side walls of two adjacent main columns 1-2-1. The reinforcing beams 1-2-3 are distributed in a grid shape inside the jig unit 1 and both ends are fixedly connected to the side walls of the main column 1-2-1.

[0041] It should be noted that by arranging the cross rib 3 inside the main column 1-2-1 and welding the cross rib 3 inside the main column 1-2-1, the strength of the main column 1-2-1 can be further improved, so that it stably connects the upper top plate 1-3 and the lower top plate 1-4. After the pipe truss is placed on the jig unit 1 and spliced, the stability of the overall jig unit 1 after splicing can be ensured.

[0042] In this embodiment, the angle adjustment assembly includes an adjustment cylinder 4, an upper cover body 5, a lower cover body 6, an adjustment sphere 7 and an adjustment rod 8. The bottom of the adjustment cylinder 4 is fixedly installed on the moving base 2 and the number of adjustment cylinders 4 is multiple and distributed in a rectangle. The piston rod of the adjustment cylinder 4 passes through the upper top plate 1-3. The upper cover body 5 is fixedly connected to the end of the piston rod of the adjustment cylinder 4. The lower cover body 6 covers the top of the upper cover body 5.

[0043] It should be noted that through the arranged angle adjustment assembly, when the angle of the jig unit 1 needs to be adjusted, the piston rod of the adjustment cylinder 4 is fixedly connected to the lower cover body 6, the adjustment sphere is movably connected inside the upper cover body 5 and the lower cover body 6. By starting the adjustment cylinder 4 on one side, the piston rod is driven to move upward, and the piston rod on the adjustment cylinder 4 on the opposite side moves downward. Since the top end of the adjustment rod 8 is fixedly connected to the load-bearing top plate 1-1 and the other end is fixedly connected to the adjustment sphere 7, the adjustment sphere 7 rotates inside the upper cover body 5 and the lower cover body 6, making the load-bearing top plate 1-1 tilt towards the side where the piston rod descends, so as to realize the angle adjustment of the jig unit 1.

[0044] Specifically, during the up and down movement of the piston rods in the adjustment cylinders 4 on the same side, since the electric push rod 10 is also connected to the load-bearing top plate 1-1 through the universal joint 11, the electric push rod 10 on the same side also moves synchronously with the piston rod in the adjustment cylinder 4, so that the angle of the load-bearing top plate 1-1 can be adjusted to meet the assembly requirements of pipe trusses with different spans and curvatures, and the flexibility during the assembly of the pipe truss is improved.

[0045] In this embodiment, hemispherical surfaces are formed inside the upper cover body 5 and the lower cover body 6. The adjusting sphere 7 is movably located inside the upper cover body 5 and the lower cover body 6. Locking screws 9 distributed annularly are provided between the outer walls of the upper cover body 5 and the lower cover body 6. The adjusting rod 8 is fixedly connected to the outer wall of the adjusting sphere 7 and the other end thereof penetrates through the upper cover body 5 and is fixed on the load-bearing top plate 1-1.

[0046] It should be noted that the adjusting sphere 7 is movably arranged inside the upper cover body 5 and the lower cover body 6, so that it can rotate inside, and the adjusting rod 8 extends out of the upper cover body 5. Thus, after the telescopic rod in the electric push rod 10 realizes height change, the adjusting sphere 7 can realize rotation.

[0047] In this embodiment, the height control assembly includes an electric push rod 10 and a universal joint 11. The bottom of the electric push rod 10 is fixedly connected to the lower top plate 1-4 and is distributed annularly. The telescopic rod on the electric push rod 10 passes through the upper top plate 1-3. The universal joint 11 is located above the upper top plate 1-3 and is fixedly connected to the end of the telescopic rod in the electric push rod 10. The other end of the universal joint 11 is fixedly connected to the bottom of the load-bearing top plate 1-1.

[0048] It should be noted that through the provided height adjustment assembly, when the electric push rods 10 rise and fall synchronously together, the telescopic rods in the electric push rods 10 are connected to the load-bearing top plate 1-1 through the universal joints 11, realizing the change of the height of the load-bearing top plate 1-1, and the height of the tire rack unit 1 can be adjusted according to different installation requirements.

[0049] Specifically, when the electric push rods 10 on both sides realize height changes at different levels, the telescopic rods in the electric push rods 10 and the load-bearing top plate 1-1 are connected through the universal joints 11, so that the angle change of the load-bearing top plate 1-1 can be realized, and the adjusting sphere 7 will also rotate. At this time, it mainly provides a supporting force for the inclination of the load-bearing top plate 1-1. Therefore, the angle adjustment of the load-bearing top plate 1-1 by the angle adjustment assembly depends on the coordination of the height control assembly.

[0050] In this embodiment, an installation frame 12 is provided on the outer wall of the load-bearing top plate 1-1. The vertical cross-sectional profile of the installation frame 12 is "concave". A main shaft is provided inside the installation frame 12. A prestressed cable 13 wound in multiple turns is provided on the main shaft. One end of the prestressed cable 13 extends above the load-bearing top plate 1-1. A motor 14 connected to an external power supply is provided on one side of the installation frame 12. The output shaft of the motor 14 is connected to the main shaft. After the tire rack units 1 form a tire rack, a welding robot 15 is provided on the top of one of the load-bearing top plates 1-1, and the welding robot 15 is equipped with a welding fixture.

[0051] It should be noted that through the installed installation frame 12, the installation frame 12 has two directions on the building jig. By driving the main shaft with the motor 14, the prestressed cable 13 can be driven to move. The other end of the prestressed cable 13 is connected to the pipe truss. Thus, during the assembly process of the pipe truss, the position of the pipe truss can be adjusted through the prestressed cable 13, which is more convenient for later installation.

[0052] A welding robot 15 is arranged on the load-bearing top plate 1-1. A welding fixture is installed on the welding robot 15. The welding fixture includes an electromagnetic chuck and a hydraulic jaw. Thus, during the assembly process of the pipe truss, the pipe truss is fixed by the welding fixture, and then welded by the welding robot 15 to realize the connection of the pipe truss joints, further improving the construction efficiency.

[0053] In this embodiment, positioning insertion rods 16 are provided at the bottom of the lower top plate 1-4 and near the four corners. A positioning ring 17 is provided on the top of the moving base 2. The positioning ring 17 is welded to the top of the moving base 2. A fastening bolt 18 with a threaded fit is provided on the positioning insertion rod 16. After the positioning insertion rod 16 passes downward through the positioning ring 17 and the moving base 2, the fastening bolt 18 passes upward through the positioning insertion rod 16 and is locked at the bottom of the moving base 2. Moving wheels 19 are provided at the bottom of the moving base 2 near the four corners.

[0054] It should be noted that by providing the positioning insertion rod 16 on the lower top plate 1-4, the positions of the positioning insertion rod 16 and the positioning ring 17 are opposite. After the lower top plate 1-4 and the moving base 2 are assembled with each other, the fastening bolt 18 is locked upward inside the positioning insertion rod 16, and the fixed installation of the lower top plate 1-4 and the moving base 2 can be realized. Moreover, it can also be quickly disassembled in the later stage. Moving wheels 19 are designed on the moving base 2, and the building jig unit 1 can be driven to move through the moving wheels 19, so that the position of the pipe truss can be adjusted.

[0055] In this embodiment, connecting insertion plates 20 and limiting frames 21 are respectively installed on two adjacent building jig units 1. An assembly plate 22 with a fixed connection is provided between the upper and lower cross beams 1-2-2. The connecting insertion plates 20 and the limiting frames 21 are respectively welded on the assembly plate 22. A positioning pin 23 is provided outside the limiting frame 21. After two adjacent building jig units 1 are assembled, the connecting insertion plate 20 is inserted into the inside of the limiting frame 21, and the positioning pin 23 is inserted into the connecting insertion plate 20 and the limiting frame 21 from above.

[0056] It should be noted that by arranging the connecting insertion plate 20 and the limiting frame 21 between two adjacent jig units 1, when it is necessary to splice the jig units 1, the connecting insertion plate 20 on one jig unit 1 is inserted into the limiting frame 21 on another jig unit 1. By inserting the positioning pin 23 into the connecting insertion plate 20 and the limiting frame 21, the fixation of the two can be achieved, thereby connecting the two jig units 1 together for rapid splicing, and it is also convenient for disassembly in the later stage, which is simple and fast.

[0057] The embodiments of the present invention are given for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A large-span space pipe truss assembly system, characterized in that: Including: A jig unit (1), the number of the jig units (1) being multiple and adopting a modular design. A plurality of the jig units (1) together form a jig. A moving base (2) is provided below the jig unit (1). The jig unit (1) includes a load-bearing top plate (1-1), a main frame (1-2), an upper top plate (1-3) and a lower top plate (1-4). The load-bearing top plate (1-1) is located above the upper top plate (1-3) and is used for placing a pipe truss. An angle adjustment assembly is provided on the top of the moving base (2), and the angle adjustment assembly passes through the jig unit (1) and is movably connected to the bottom of the load-bearing top plate (1-1). It further includes a height control assembly. The bottom of the height control assembly is installed on the top of the lower top plate (1-4), and the top is movably connected to the load-bearing top plate (1-1).

2. The long-span spatial pipe truss assembly system according to claim 1, wherein: The jig unit (1) is made of Q460 high-strength steel. After adjacent jig units (1) are assembled, there is a gap between adjacent load-bearing top plates (1-1) above, and the cross-sectional area of the load-bearing top plate (1-1) is larger than the cross-sectional areas of the upper top plate (1-3) and the lower top plate (1-4).

3. The large-span space pipe truss assembly system according to claim 1, characterized in that: The upper top plate (1-3) and the lower top plate (1-4) are fixedly connected to the top and bottom of the main frame (1-2). The main frame (1-2) is composed of main columns (1-2-1), cross beams (1-2-2) and reinforcing beams (1-2-3). The number of the main columns (1-2-1) on one main frame (1-2) is four and is distributed in a rectangle.

4. The large-span space pipe truss assembly system according to claim 3, characterized in that: The top and bottom of the main column (1-2-1) are respectively fixedly connected to the upper top plate (1-3) and the lower top plate (1-4). The inside of the main column (1-2-1) is hollow. A cross rib (3) is provided inside the main column (1-2-1), and the cross rib (3) is welded inside the main column (1-2-1). The cross beams (1-2-2) are symmetrically welded to the opposite side walls of two adjacent main columns (1-2-1) up and down. The reinforcing beams (1-2-3) are distributed in a grid shape inside the jig unit (1) and both ends are fixedly connected to the side walls of the main columns (1-2-1).

5. The large-span spatial pipe truss assembly system according to claim 1, wherein: The angle adjustment assembly includes an adjustment cylinder (4), an upper cover body (5), a lower cover body (6), an adjustment sphere (7) and an adjustment rod (8). The bottom of the adjustment cylinder (4) is fixedly installed on the moving base (2), and the number of the adjustment cylinders (4) is multiple and is distributed in a rectangle. The piston rod of the adjustment cylinder (4) passes through the upper top plate (1-3). The upper cover body (5) is fixedly connected to the end of the piston rod of the adjustment cylinder (4), and the lower cover body (6) covers the top of the upper cover body (5).

6. The large-span spatial pipe truss assembly system according to claim 5, characterized in that: A hemispherical surface is formed inside the upper cover body (5) and the lower cover body (6). The adjusting sphere (7) is movably located inside the upper cover body (5) and the lower cover body (6). Locking screws (9) distributed annularly are provided between the outer walls of the upper cover body (5) and the lower cover body (6). The adjusting rod (8) is fixedly connected to the outer wall of the adjusting sphere (7) and the other end thereof penetrates through the upper cover body (5) and is fixed on the load-bearing top plate (1-1).

7. The large-span space pipe truss assembly system according to claim 1, characterized in that: The height control assembly includes an electric push rod (10) and a universal joint (11). The bottom of the electric push rod (10) is fixedly connected to the lower top plate (1-4) and is distributed annularly. The telescopic rod on the electric push rod (10) penetrates through the upper top plate (1-3). The universal joint (11) is located above the upper top plate (1-3) and is fixedly connected to the end of the telescopic rod in the electric push rod (10). The other end of the universal joint (11) is fixedly connected to the bottom of the load-bearing top plate (1-1).

8. The large-span space pipe truss assembly system according to claim 1, wherein: An installation frame (12) is provided on the outer wall of the load-bearing top plate (1-1). The vertical cross-sectional profile of the installation frame (12) is "concave". A main shaft is provided inside the installation frame (12). A prestressed cable (13) wound in multiple turns is provided on the main shaft. One end of the prestressed cable (13) extends above the load-bearing top plate (1-1). A motor (14) connected to an external power supply is provided on one side of the installation frame (12). The output shaft of the motor (14) is connected to the main shaft. After the jig units (1) form a jig, a welding robot (15) is provided on the top of one of the load-bearing top plates (1-1), and the welding robot (15) is equipped with a welding fixture.

9. The large-span space pipe truss assembly system according to claim 1, wherein: Positioning insertion rods (16) are provided at the bottom of the lower top plate (1-4) and near the four corners. A positioning ring (17) is provided on the top of the moving base (2). The positioning ring (17) is welded to the top of the moving base (2). A fastening bolt (18) with a threaded fit is provided on the positioning insertion rod (16). After the positioning insertion rod (16) passes downward through the positioning ring (17) and the moving base (2), the fastening bolt (18) passes upward through the positioning insertion rod (16) and is locked to the bottom of the moving base (2). Moving wheels (19) are provided at the bottom of the moving base (2) and near the four corners.

10. The large-span spatial pipe truss assembly system according to claim 3, characterized in that: Connection inserts (20) and limit frames (21) are respectively installed on two adjacent jig units (1). An assembly plate (22) with a fixed connection is provided between the upper and lower cross beams (1-2-2). The connection insert (20) and the limit frame (21) are respectively welded to the assembly plate (22). A positioning pin (23) is provided outside the limit frame (21). After two adjacent jig units (1) are assembled, the connection insert (20) is inserted into the inside of the limit frame (21), and the positioning pin (23) is inserted into the connection insert (20) and the limit frame (21) from above.

Images